What DSC Does
Digital Selective Calling sends digital alerts and calls on Channel 70. It can alert stations, identify the calling set, and request a voice channel.
- Digital alerts on Channel 70
- Uses MMSI identity
DSC
Module 8 of 10
Digital Selective Calling
MMSI, Channel 70, routine individual calls, distress alerts, acknowledgements, and DSC follow-up voice procedure.
MMSIChannel 70Distress alertRoutine individual call
Lesson summaries
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MMSI
The Maritime Mobile Service Identity is the digital identity used by DSC equipment. It must be programmed correctly and match the licensed radio arrangement.
- Digital radio identity
- Must be programmed correctly
Routine and Distress DSC
Routine DSC can call an individual station and propose a working channel. Distress DSC alerts all DSC-equipped stations in range and must be handled with care.
- Routine individual calls
- Distress alerts
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